See page 3 here: https://www.copyright.gov/circs/circ33.pdf https://www.copyright.gov/circs/circ33.pdf “Works not protected by copyright” And 906.4 here: http

See page 3 here: https://www.copyright.gov/circs/circ33.pdf https://www.copyright.gov/circs/circ33.pdf “Works not protected by copyright” And 906.4 here: https://www.copyright.gov/comp3/chap900/ch900-visual-art.pdf https://www.copyright.gov/comp3/chap900/ch900-visual-art.pdf It may be considered a derivative work, but that doesn’t matter if it’s a derivative of only the portion of the original work (the glyph shapes) that cannot be copyrighted as a matter of law.